More than a million foreigners reportedly reside in South Korea now, with unskilled migrant workers accounting for a majority. Although the country’s reliance on imported foreign labor is likely to continue unabated, the country prides itself as an ethnically homogenous society and insists on almost zero immigration policy. However, this paper shows that Korean society is rapidly becoming a multicultural society and this process is inevitable and irreversible. In support of this argument, the paper examines various social factors that are contributing to the making of a multiethnic Korea, including the continuing influx of migrant workers, rapid aging of the population, low fertility rate, and shortage of brides. The paper also assesses the applicability of various theories and trends of migration to the Korean context. The Korean case suggests a need for a paradigm shift in understanding multiculturalism. (The rest omitted)